Split clearing mechanism



5 A. B. MACHADO ETAL 2,666,582

SPLIT CLEARING MECHANISM Filed Jan. 11, 1949 I s Sheets-Sheet 1 i E L IN VEN TORS.

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g ANTHONY B. Macvmoo A. a. MACHADO mm. 2,666,582 SPLIT CLEARING MECHANISM 3 Sheets-Sheet 2 F o J m mm H M F- k\ Wi m WEE M m w E E j (xv .v f M K. 3 g n J V////// W 8 mv v0 e 6? AF u v B i 3 Qw fi Jan. 19, 1954 Filed Jan. 11 1949 i 1954 A. B. MACHADO ETA],

SPLIT CLEARING MECHANISM 3 Sheets-Sheet 3 Filed Jan. 11, 1949 INVENTORS. ANTHONY 5.,MAtHAbO FRANK J. PizuaLLAea 00 mm -o. no. 60.

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Patented Jan. 19, 1954 4, PATENT OFFICE Q srm'rcmai iififiscnamsM Anthony B. Machado, San L andra and Frank J. Y ,Prnellage, Oakland, Calig assignors to Eriden "Calculating Machine '00,, Inc., a corporation pi -California applicant Janu ry 11. 194% Ser a n mm 8 Claims.

wh els o he c umu ato may b c a d pensiently 9f theremainder of the wheels thereof.

1 Mechanisms of this type mentioned above are well kno n-in the alc lating art and ave been idisclosed in previously issued patents. See, for

example; It 5- Pa en vN 2,334,43 s ed November 1.6, 1941 to John L. Moody, which shows a pl olear mechan sm for causing either he lefthand group of accumulator wheels to be cleared, the right-hand group of wheels to be cleared, or both groups of wheels to be cleared simultaneously. In the case of themachine disl ses! i the a o e-men ion at n i t clear mechan sm s condit ned to e r ly one o t e other .of the two no s. of wheels an it is .found necess ry to res t all of th cumulate whee to zero, the op rator fi s nip la esa control knob before perfo m n he c ar.- in ope at on in o d r to condit n the e r n mechanism tie a simul eou res ttin of both op at on, a n scilosed a ov a nove split-c e r mechanism has been devised so that the entire a cumul tor m y be c ea at any t me by manua operation o the c ean ng m ism nsteadei by t e power-d ven mechanism o d na tily used .fo t s pur o e- Thus, f the ma ichine is set for a split-clear operation, and the operator wishes to c -a l o th wh els it i only necessary t a h pe a the and c a aneemechanism. thereby liminat n th si ubl ma i ulation of th tle cont ol kno which would otherwise benecessary.

Accordingly, it is an object of the present inv ntion to provide an imp oved types of s lit- ..clear mec anismior calc ia ne nach es.

nnot ero ieet of t e invention 11S to provioe va combin d manual andno er aran e chanism for calcul ing mach ne which may h cond on dso-ast zca c ea in o on n .gronp o nume al wh el en he e han is onerati e by n w r, and earan f e her shown in the accompanying the numeral wh el hen the mechanism is op ra ed manu ly Anothe bject of the nv nt on .is t pro id a split-clear a th s a e se ons of which are normall oup ed t ge her c njoint ope at n when th machine i at restzo en th rac is pe ated y h nd, b t wh ch may be automatica y n up d, ear y in the po e clea ng cle o e mach ne so as o "enahle one of the sec on o vhe ope atedj depend n ir of the other.

Other o jects of the invention will become apparent from the following description of one possible embodiment of the invention which drawings there I Figure l is a view of the entire machine, show ing the arrangement of the various keys andthe ishiftable numeral wheel carriage.

Figure 2 is a plan view of the left-hand side of the carriage with parts broken aways owes to more clearly illustrate the split-clear mechan sm.

Figure 3 is a plan view of the right-hand side of the carriage with parts brokenaway so as to show the construction of the clearing mechanism;

Figure 4 is a rear elevation of the leftehand side of the machine showing the cooperation between the .spliteiclear, mechanism and the :powermlearance mechanism.

Figure 5 is a cross-sectional view of the canriage taken alongthe line 51-25 in Figure A.

General des r pt on f ma ine In the ac ompan n draw s th present n nt on is sh w as a p ied to a machineof the type d sclosesi in U Pa ent No, more. i su d Ja uary .28, 19461, to can M- Frid'enl to h ch pa en re e nce s made f a complete vdisclosure of the basic machine. The calculating machine show i th at nt and also th present drawings, is of the rotary type, using ia mo ifi d Thom s tvpeac uatine mecha'rn i and a ke bo d t pe o l cti n (me anism. shown in Figure l, amounts may be entered into a e es f ac umu ato wheels 20 m im h s i t r a b de re sin he anompriate amount keys 22 and then depressingei ther plns bar 23 or minus bar 24 so as to cause the main actuating mechanism of the machine to be given a cycle of operation. The amount set on the numeral keys 22 will thereuponhe en'- tered either positively or negatively into the accumulator wheels -20. case an erroneous s ting is mad on the a oun keys 22; the asordinal position to the next. Reference is made to U. S. Patent No. 2,294,083, issued to Carl M. Friden on August 25, 1942, for a complete dis.- closure of the carriage shift mechanism operated under the control of the shift keys 2? and 28. The numeral wheel carriage 2] may be returned to its extreme left-hand position and the numeral wheels 2i! reset to zero, upon the arrival of the carriage in this position, by depression of a return clear key 29. For a complete disclosure of this mechanism, reference is made to the above-mentioned Patent No. 2,294,083.

Referring to Figures 2 to 5, inclusive, the numeral wheel carriage indicated generally at 2| includes right and left end frames, designated by reference numeral 3i] and 3!, respectively, which end frames are mounted on opposite ends of a hollow frame bar 32. As shown in Figures 2 and 3, the end frames 30 and 3| also support a guide rail 33 extending across the front of the carriage, which rail serves to support and guide the carriage in its transverse movements across ,the machine. As shown in Figure 5, the numeral wheels 20 of the accumulator are mounted on the upper ends of a series of numeral wheel shafts 34 which are journaled in the frame bar 32. At its lower ,end, each numeral wheel shaft carries a tentooth gear 35 by means of which values may be introduced into the numeral wheels, as disclosed in aforementioned Patent No. 2,229,889. Each shaft 34 also carries a ten-tooth star wheel 36 engaged by a spring-pressed ball 31 for alignving and maintaining the numeral wheels in any one of its ten numerical positions.

Clearing mechanism gears 42 are all returned to the position shown in Figure 2 by means of rack teeth 43 formed on parallel resetting members comprising rack bars as shown in Figure 5. There are two sets of the resetting rack bars in the present machine, a

right-hand set 44 and 45 and a left-hand set 46 and 41. tween the eighth and ninth orders of the accumulator so that the numeral wheels of the The split in the rack'bars occurs befirst eight orders may be reset to zero independently of the higher order numeral wheels, or vice versa. The rack bars of each set are secured to one another by means of suitable spacers and "studs 48.

As shown in Figures 3, 4 and 5, each pair of rack bars is mounted for longitudinal sliding movement within the hollow frame bar 32 so as to enable the rack teeth 43 to move past the mu- "tilated gears 42 and to pick up any of the gears which are not at zero and to rotate the sameuntil they arrive at their zero positions, as shown 4 in Figure 2. In order to insure that the numeral wheels stop at zero without any overthrow, a stop slide 49 is mounted on the upper surface of the frame bar 32, this slide being provided with a plurality of teeth 50 which are adapted to engage stop shoulders 5| provided on discs 52, secured to the numeral wheel shafts'34 immediately below the numeral wheels 20. The slide 49 is normally held toward the left, as shown in Figure 2, by means of a tension spring 53 which I isstretched between the left-hand end of the slide and a lug provided on a bracket 54 fastened to the frame bar 32.

Secured to the right-hand end of the rack bars 44 and is an upstanding pin (not shown) on which is mounted a manual resetting knob (see Figures 1 and 3), by means of whichthe rack bars 44 and 45 may be manually moved toward the right so as to cause resetting of the.

numeral wheels in the-first eight orders of the accumulator. The resetting knob part 60 is provided with an abutment arm connection 6| which is adapted to cooperate with a stud 62 mounted on an actuating slide 63. This slide is mounted for endwise sliding movement on the frame bar 32 by means of pin and slot connections, one of which is shown in Figure 4, and is therein designated by reference numeral 64. The slide is normally maintained in its left-hand position, as viewed from the front of the machine, by means of a tension spring 65 connected between the slide and the pin 64. On its right-hand end, the slide 63 is provided with a forwardly-extending arm 66 (Figure 3) which lies in front of the resetting knob 60 so that whenever the knob (it is moved toward the right by manual manipulation thereof, the operating slide 63' will likewise be forced toward the right against the action of the spring 65. When the knob 60 is released, the spring 65 will act to restore the rack bars 44 and 45 to their normal, or left-hand, position.

As will be described later herein, the operating slide 63 is arranged to be reciprocated by power derived from the motor-driven mechanism of the machine. Hence, when the abutment arm BI is located in front of the stud 62, as shown in Figure 3, the rack bars 44 and 45 will be carried to the right along with the slide 63 and cause resetting of the numeral wheels in the first eight orders of the accumulator. Theoperation of the rack bars 44 and 45 by the slide 63 may be prevented, however, by twisting thelresetting knob 60 counter-clockwise so as to remove the arm BI from'in front of the stud 62, thereby breaking the connection between the slide and the rack bars.

The stop slide 49, mentioned earlier herein, is adapted to be moved to the right against the action of the spring 53 whenever the rack bars 44 and 45 are moved toward the right for resetting the numeral wheels to zero.' For this purpose, the stop slide 49 is provided on its right-hand end with a pin 61 (Figure 3) which lies within a notch provided in the rearwardlyextending arm of a bell crank 68. This bell crank is pivotally mounted on a screw 69 fastened to the frame bar 32 and is provided with a rightwardly-extending arm provided with a cam face 10 which will be engaged'by the pin upon which the resetting knob 60 is mounted so as to cause clockwise rocking movement of the bell crank as the rack bars move toward the right. This movement of the bell crank will be transmitted to the stop slide 49 bymeans of the pin 61 and cause the slide to be moved toward the assess-2 new; sea n ing-themeth S th'e're'in into active position with respect to the stopshouldersjl, as each numeralwheel reaches its zero position, its associated stop shoulder-'51 will engage with the tooth 50 on the'sli-de 49 and hence cause the numeral wheel to be positively stopped in its zero position..

Split-clear mechanism As previously explained, the rack bars 44 and 45 are associated with the lower part of the series wheels, this coupling beingof such 'a nature that both groups of numeral wheels will alway be reset when the knob 60 is manually operated,rbut may be selectively conditioned for clearing of the lower order wheels only when clearing is effected by power. As shown in Figure 2, the rack bars 46 and 41 carry a bracket II which is provided with aformed-overeear 12. The ear 12 (see also Figure 4) is connected by a tension spring I3 with an ear provided on a bracket 14, secured to the carriage frame bar 32 so as to normally maintain the rack bars "46 and 41 in their left-hand, or normal, position. As shown in Figure 4, the operating slide 63 carries a coupling latch I5 which is pivotally mounted on a screw I6 secured to the slide as. The latch 15 is normally held in its effective position where it engages with the car 12 by a spring TI which resiliently maintains -the latch in contact with a pin on the slide -63. Hence, when the latchis in its effective position, as shown in Figure 4, the rack bars 46 and v 41 for the higher order numeral wheels will be effectively coupled to the slide 63 so that the higher order numeral wheels will be reset upon reciprocation of the slide.

v Means is provided whereby the latch may be disabled when the slide 63 is operated by the power'resetting mechanism so as to prevent resetting of the higher order wheels along with the lower order of wheels when this is found to be desirable.

For this purpose, a latch disabling slide 85 is provided on the rear of the carriage, this slide being supported at one end by a slot formed therein which engages with the pin 04, and at the other end by a slot formed in a bracket 86 secured to the bracket 14. The slide is normally urged toward the'right, as viewed in Figure 4,

by means of a tension spring 81, connected between the slide and a carriage limit stop 88 secured to the frame bar 32. The upper edge of the slide 85 is provided with a shoulder 89 which is adapted to cooperate with an ear 90 formed on the latch 15. On the left-hand end of the slide 85, as viewed from the rear of the machine, there is provided a downwardly-extending finger 91 which, when-the carriage is in its extreme lefthand position (right-hand position as 'viewed in Figure 4) lies in front'of an ear 9-2 formed on the upper end of a lever '93- w hichis pivotally mounted on ascrew 94 secured to a cross bar 95 which is fastened between the left'side frame 96 and the rightside frame (not shown) of the machine. The lever 93 is provided on its lower end with an angularly disposed'ear 91 which lies over the outer end of acentraliaing arm 98- pivotally mounted on a screw stud '99 secured to the cross bar 95. The arm 98 is;urged downwardly 'by'a pring I00 so as to bearagainst a fiat lul pro-- videdon the hub I02 of a -power resetting cam I03. The cam I03 is-rnounted on a-shaft I04 which is arranged to be --driven from one of the actuator shafts of, the machine by means of a suitable clutch mechanism, this structure being fully shown and described in the aforementioned Patent No.2,294,083.

- Ina power resetting operation, the shaftIM is rotated during cycling of the machine whereby the cam I03 oscillates a follower a'rm- I05 wh'i'ch ispivotally-mounted at-l06on the cross-bar 95. The arm I05 is provided at its'upper end with a bifurcation which engages with a roller stud I01 mounted on a slide I08 which is supported for endwise sliding movement on the cross bar--95 by means of a plurality of pivoted rollers I09. The slide I08 is provided with a projection 'I I0 which .is adapted to engage the end of an arm I II which is pivotally mounted on the operating slide 63 as disclosed in Patent No. 2,294,083.

When the carriage 2| reachesits leftmost position as shown in Figure 4, reciprocation of the slide I08 by the cam I 03 will cause the opera-ting slide 63 to be moved toward the right (to the left as viewed in Figure 4) due to the engagement of the arm III by the projection H0. Also, the fiat IOI on the hub I02 will cause the arm 98 to be rocked counter-clockwise,-as viewed in Figure 4, thereby rocking the lever 83cou'nt'er-clockwise so as to cause the slide 85 to be move'd toward the left as viewed in Figure 4. With the parts positioned as shown in Figure 4,-this movement of the slide 85 will be an idle one inasmuch as the shoulder 89 lies below the ear '90 onlatch "I5 and will pass idly beneath the ear when the slide is operated. Hence, the latch will not be disabled and the reciprocation of the operating slide 63 will cause resetting of the higher order numeral wheels.

In the event that "the operator wishes-to prevent the resetting of the higher order numeral wheels during a power clear operation, he may achieve this result by rotating 3, split-clearing knob IIZ counter-clockwise, as viewed in Figures 1 and 2, so as to e1ev-atetheslide'85. The knob H2 is rotatively journalled on a pin II3 (see Figure 5) which is mounted in anupright position on the bracket 14. Also journalledon the pin I|3,.immediately beneath the knob H2, is a sleeve H4 which is clutched to the knob I12 for operation thereby and carries at its lower end a cam I I5 which is adapted to engage with an inclined surface H6 (Figure 4) .provided on the latchdisabling slide when the knob is rotated counter-clockwise. The knob II2 and sleeve I M are resiliently urged downwardly on thepin H3 bya compression spring I I! located within 'a recess provided in the knob so as-to resiliently urge a V-shaped notch provided in the lower end of the sleeve into engagement with a pin H8 extending transversely through the pin H3. A

second V-shaped notch is provided in'the sleeve I Hi for locating theca'm I I5-in its latch-disabling I position.

a begins moving toward .the left, as viewed in Fig- 7 ure 4, the latch 15 will have been disengaged from the ear 12 and the rack bars 46 and 41 'for the higher order numeral wheels will remain at rest during movement of the slide 63.

Operation From the foregoing description, it will be noted that whenever the resetting knob 66 is manually moved toward the right, both sets of rack bars will be operated so as to cause simultaneous clearing of both groups of numeral wheels. That is, the latch 15 is normally effective to couple the two sets of rack bars together, and can only be disabled by operation of the power resetting mechanism.

When the split-clear knob H2 is in the position shown in Figures 1 and 2, and the return clear key 29 is depressed, the carriage 2| will be shifted to its extreme left-hand position, after which the projection H9 (Figure 4) will engage the arm I I l and cause reciprocation of the operating slide 63. Assuming the resetting knob 60 to be in the angular position shown in Figure 3 where the arm 6| lies in front of the stud G2 on the slide 63, the movement of the slide 63 will cause both sets of rack bars to be operated and will cause simultaneous clearing of both-groups of numeral wheels since the latch l will not be disabled when the slide 85 is in its lower position. However, if the operator twists the knob I I2 counten-clockwise and then subsequently depresses the return clear key 29, the accumulator wheels in the first eight orders will be reset, but the remaining accumulator Wheels will remain at their previous settings. that the latch-disabling slide 85 will be lifted against the action of the spring 8'! when the knob H2 is turned counter-clockwise so as to bring the shoulder 89 into engagement with the ear 90, thus conditioning the slide 85 for disabling the latch 75. Hence, at the very outset of the clearing cycle, the latch will be released from the ear 12 due to the lifting of the centralizing arm 98 by the fiat ill! on the hub of the resetting cam I03.

It will thus be noted that while the machine may be conditioned for a split-clear operation so as to cause clearing of only one group of numeral wheels whenever the return clear key 29 is depressed, the operator may, if he wishes, cause all of the dials to be cleared, irrespective of the setting of the knob H2, by manually operating the resetting knob lit. This eliminates the necessity for a double manipulation of the split-clear knob H2 in cases where it is desirable to clear all of the numeral wheels after a particular point in the calculations has been reached, and to then restore the machine to its previous condition so as to again cause the clearing mechanism to be split.

It is to be noted that numbers may be accumulated either in the left-hand group of numeral wheels while the right-hand group of wheels is reset by use of the split-clear mechanism or, alternatively, numbers may be accumulated in the lower order group of wheels while the higher order wheels are periodically reset to zero. The last-mentioned type of operation can be secured by twisting the reset knob til counter-clockwise so as to uncouple the rack bars 64 and 45 from the operating slide (53 and locating the knob H2 in the position shown in Figures 1 and 2. With this setting of the knobs, the operation of the power clear mechanism will cause operation of the rack bars 46 and 41, but not the rack bars This will result from the fact 44 and 45 and hence only the left-hand group of accumulator wheels will be cleared. Here again, however, both groups of wheels may be reset by operation of the knob 60 which, in this case, will pick up the operating slide 63 and through the latch 15 cause operation of the rack bars 46 and 41, thereby causing simultaneous clearing of all numeral wheels.

While the form of mechanism herein shown and described is well adapted to fulfill the objects of the present invention, it is to be understood that it is not intended that the invention shall be confined to the particular form or embodiment herein disclosed since it is capable of embodiment in various forms, all coming within the scope of the claims which follow.

We claim:

1. In a machine of the class described having a register comprising a single series of numeral wheels adapted in one type of machine operation to have entered therein two totals accumulated separately in two dififerent parts of saidseries of numeral wheels, and in another type of machine operation to accumulate a single total with ordinal values thereof registered in both of said two parts of said series of numeral wheels and means for introducing numerical values into said wheels, the combination of separate means for resetting the wheels in each part of said series to zero; a common operating member for both of said resetting means; a cyclically operable power driving means; a lost motion driving connection between said power driving means and said common operating member so as to cause a slight delay in the operation of said member by said driving means; means for connecting said common operating member with one of said resetting means so as to cause the associated numeral wheels to be reset to zero whenever said common operating member is operated; normally efifective means for connecting said common operating member with the other of said resetting means so as to cause the associated numeral Wheels to be reset to zero whenever said common operating member is operated; and means operated by said power driving means during the early part of its cycle for disabling said normally efiective means prior to movement of said common operating member by said driving means.

2. In a machine of the class described having a register comprising a single series of numeral wheels adapted in one type of machine operation to have entered therein two totals accumulated separately in two difierent parts of said series of numeral wheels, and in another type of machine operation to accumulate a single total with ordinal values thereof registered in both of said two parts of said series of numeral wheels and means for introducing numerical values into said wheels, the combination of separate means for resetting the wheels in each part of said series to zero; a common operating member for both of said resetting means; a cyclically operable power driving means; a lost motion driving connection between said power driving means and said common operating member so as to cause a slight delay in the operation of said member by said driving means; means for connecting said common operating member with one of said resetting means so as to cause the associated numeral wheels to be reset to zero whenever said common operating member is oper ated; normally effective means for connecting said common operating member with the other of said resetting means so as to cause the assoelated numeral wheels to be reset to zero whenever said common operating member is operated; means operated by said'power driving means during the early part of its cycle fordisabling said normally effective means prior to movement of said common operating member by said driving means; and selectively operable means for rendering said last-named means ineifective to disable said normally eirective means.

3. In a machine of the class described having a register comprising a single series of numeral wheels adapted in one type of machine operation to have entered therein two totals accumulated separately in two different parts of said series of numeral wheels, and in another type of machine operation to accumulate a single total with ordinal values thereof registered in both of said two Parts of said series of numeral wheels and means for introducing numerical values into said wheels, the combination of separate means for resetting thewheels in each part of said series to zero; a manually operable member for operating said resetting means; means for connecting said manually operable member with one of said resetting means for causing the associated wheels to be reset to zero whenever said member is operated; a device carried by said member for connecting said member with the other of said resetting means so as to normally cause the associated wheels to be reset to zero whenever said member is operated; a cyclically operable powerdriving means; a lost motion driving connection between said power driving meansand said member so as to cause a time delay in the operation of said member by said driving means; means, including an element operated by said power driving means during the early part of its cycle for disabling said connecting device prior to movement of said member by said driving means,

said element having a position in which it is effective to disable said connecting device and a position in which it is ineffective to disable said device; and a manipulative member for determining the position of said element.

4. In a calculating machine having a register for accumulating values, said register comprising a series of numeral wheels arranged in a row and adapted in one type of machine operation to have entered therein two totals accumulated separately in two difierent parts of the said series of numeral wheels, and in another type of machine operation to accumulate a single total with ordinal values thereof registered in both of said two parts of said series; zero resetting means including two movable members, movement of one of said movable members causing the numeral wheels in one part of said series of numeral wheels to be reset to zero and movement of the other of said movable members causing the numeral wheels in the other part of said series of numeral wheels to be reset to zero; cyclically operable power driven means; an actuating member operable by said power driven means to effect movement of said one of said movable members; a normally engaged but disengageable coupling between said actuating member and said other of said movable members; means for disabling said coupling; means operable during the early part of a single cycle of said power driven means for actuating said disabling means; means operable during a later part of the same cycle of said power driven means for operating said actuating member; and manipulatable means for selectively rendering said disabling means effective or inelfective for disiii abling said coupling when said disabling means is operated.

5. In a calculating machine having a register for accumulating values, said register comprising a series of numeral wheels arranged in a row and adapted in one type of machine operation to have entered therein two totals accumulated separately in two difierent parts of the said series of numeral wheels, and in another type of machine operation to accumulate a single total with ordinal values thereof registered in both of said two parts of said series; zero resetting means including two movable members, movement of one of said movable members causing the numeral wheels in one part of said series of numeral wheels to be reset to zero and movement of the other of said movable members causing the numeral wheels in th other part of said series of numeral wheels to be reset to zero; power driven means; an actuating member operable by said power driven means; a connection between said actuating member and one of said movable members; a latch for coupling said actuating member to the other of said movable members; selectively conditionable disabling mean operable by said power driven means for tion to have entered therein two totals accumulated separately in two different parts of the said series of numeral wheels, and in another type of machine operation to accumulate a single total with ordinal values thereof registered in both of said two parts of said series; zero resetting means including two movable members, movement of one of said movable members causing the numeral wheels in on part of said series of numeral wheels to be reset to zero and movement of the other of said movable members causing the numeral wheels in the other part of said series of numeral wheels to be reset to zero; power driven means; an actuating member operable by said power driven means; a connection between said actuating member and one of said movable members; a latchfor coupling said actuating member to the other of said movable members; selectively conditionable disabling means operable by said power driven means for moving said latch to a position in which it is ineffective for coupling said actuating member to said other of said movable members; means for conditioning said selectively conditionable means for causing the operation thereof to move said latch to its ineffective position; and manually operable control means for operating said actuating member, irrespective of the condition of said selectively conditionable disabling means, for thereby moving both of said movable members, and thus resetting the numeral wheels in both parts of said series of wheels.

'I. In a calculating machine having a register for accumulating values, said register comprising a series of numeral Wheels arranged in a row and adapted in one type of machine operation to have entered therein two totals accumulated separately in two different parts of the said series of numeral wheels, and in another ii i type of machine operation to accumulate a single total with ordinal values thereof registered in both of said two parts of said series; zero resetting means including two movable members, movement of one of said movable members causing the numeral wheels in one part of said series of numeral wheels to be reset to zero and movement of the other of said movable members causing the numeral wheels in the other part of said series of numeral wheels to be reset to zero; power driven means; a reciprocable actuating slide operable by said power driven means; means connecting said slide to one of said movable members; a latch movably mounted on said slide and normally coupling said slide to the other of said movable members; a latch-disabling member; a manipulatable member for selectively setting said latch-disabling member into or out of cooperative relation with said latch; and means driv able by said power driven means for operating said latch-disabling member so as to disable said latch when said latch-disabling member has been set in cooperative relation with said latch.

8. In a calculating machine having a register for accumulating values, said register comprising a series of numeral wheels arranged in a row and adapted in one type of machine operation to have entered therein two totals accumulated separately in two different parts of the said series of numeral wheels, and in another type of machine operation to accumulate a single total with ordinal values thereof registered in both of said two parts of said series; zero resettin means including two movable members, movement of one of said movable members causing the numeral wheels in one part of said series of numeral wheels to be reset to zero and movement of the other of said movable members causing the numeral Wheels in the other part of said series of numeral wheels to be reset to zero; power driven means; a reciprocable actuating slide operable by said power driven means; means connecting said slide to one of said movable means; a latch movably mounted on said slide and normally coupling said slide to the other of said movable members; a latch-disabling member; a manipulatable member for selectively setting said latch-disabling member into or out of cooperative relation with said latch; means drivable by said power driven means for operating said latch-disabling member so as to disable said latch when said latch-disabling member has been set in cooperative relation with said latch; and manually operable means for operating said slide for moving both of said movable members irrespective of the setting of said latch-disabling member by said manipulatable member, and thus resetting the numeral wheels in both parts of said series of wheels.

ANTHONY B. MACHADO.

FRANK J. PRUELLAGE.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,875,437 Friden Sept. 6, 1932 2,334,431 Moody Nov. 16, 1943 2,363,737 Machado Nov. 28, 1944 2,403,111 Moody July 2, 1946 

